The other idea I'd disagree with is how he says free (as in liberty) software can be sold. In theory it certainly can have a price tag but when the source is just out in the open there's no incentive to use the paid version as someone will certainly put out some slightly modified free (gratis) version. That's the bulk of why proprietary software exists in the first place.
One more thing that irked me was that Stallman implies that only proprietary software makers will put malicious code in their products. Really? So everyone who's on board the Free Software Movement has only good will towards man and would never dare try to harm another user for their own ends?
In the end I think Stallman makes some good points but unfortunately he ends up sounding like an ideologue and at times even a conspiracy theorist. That turns me off. If he's all about freedom then he should also accept that we have the freedom to choose free or proprietary these days and there are people who choose no free software because we don't mind being tied to a certain ecosystem. I love my Mac and I so far, while Lion does treat me like an idiot at times, don't mind the "restrictions" at all. In fact I barely notice them because they're just not important to me. That's my choice, the same choice everyone else has. I also have a Linux box which I love for different reasons. In the end I'm able to have it both says and I think everyone does.